在属于碳氢化合物的质子惰性溶剂或质子惰性的极性溶剂中,添加一种有机金属化合物,使α,ω-二碘-全氟烷属烃在较短的反应时间内脱碘氟化,可获得具有末端双键的全氟丁二烯与更高的全氟二烯烃。 In an aprotic solvent belonging to a hydrocarbon or an aprotic polar solvent, an organometallic compound is added to de-iodide the α, ω-diiodo-perfluoroalkanes in a short reaction time, Perfluorobutadiene with terminal double bonds and higher perfluorodiene can be obtained.